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Simulation of Soil Hydrological Components in Chuncheon over 30 years Using E-DiGOR Model
Aydin, Mehmet,Jung, Yeong-Sang,Yang, Jae-E.,Lee, Hyun-Il,Kim, Kyung-Dae Korean Society of Soil Science and Fertilizer 2012 한국토양비료학회지 Vol.45 No.4
The hydrological components of a sandy loam soil of nearly level in Chuncheon over 30 years were computed using the E-DiGOR model. Daily simulations were carried out for each year during the period of 1980 to 2009 using standard climate data. Reference evapotranspiration and potential soil evaporation based on Penman-Montheith model were higher during May to August because of the higher atmospheric evaporative demand. Actual soil evaporation was mainly found to be a function of the amount and timing of rainfall, and presumably soil wetness in addition to atmospheric demand. Drainage was affected by rainfall and increased with a higher amount of precipitation and soil water content. Excess drainage occurred throughout rainy months (from July to September), with a peak in July. Therefore, leaching may be a serious problem in the soils all through these months. The 30-year average annual reference evapotranspiration and potential soil evaporation were 951.5 mm and 714.2 mm, respectively. The actual evaporation from bare soil varied between 396.9-528.4 mm and showed comparatively lesser inter-annual variations than drainage. Annual drainage rates below 120 cm soil depth ranged from 477.8 to 1565.9 mm. The long-term mean annual drainage-loss was approximately two times higher than actual soil evaporation.
Simulation of Soil Hydrological Components in Chuncheon over 30 years Using E-DiGOR Model
Mehmet Aydin,Yeong-Sang Jung,Jae E. Yang,Hyun-Il Lee,Kyung-Dae Kim 한국토양비료학회 2012 한국토양비료학회지 Vol.45 No.4
The hydrological components of a sandy loam soil of nearly level in Chuncheon over 30 years were computed using the E-DiGOR model. Daily simulations were carried out for each year during the period of 1980 to 2009 using standard climate data. Reference evapotranspiration and potential soil evaporation based on Penman-Montheith model were higher during May to August because of the higher atmospheric evaporative demand. Actual soil evaporation was mainly found to be a function of the amount and timing of rainfall, and presumably soil wetness in addition to atmospheric demand. Drainage was affected by rainfall and increased with a higher amount of precipitation and soil water content. Excess drainage occurred throughout rainy months (from July to September), with a peak in July. Therefore, leaching may be a serious problem in the soils all through these months. The 30-year average annual reference evapotranspiration and potential soil evaporation were 951.5 ㎜ and 714.2 ㎜, respectively. The actual evaporation from bare soil varied between 396.9-528.4 ㎜ and showed comparatively lesser inter-annual variations than drainage. Annual drainage rates below 120 cm soil depth ranged from 477.8 to 1565.9 ㎜. The long-term mean annual drainage-loss was approximately two times higher than actual soil evaporation.
Optimal placement of elastic steel diagonal braces using artificial bee colony algorithm
E. Aydin,M. Sonmez,T. Karabork 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.19 No.2
This paper presents a new algorithm to find the optimal distribution of steel diagonal braces (SDB) using artificial bee colony optimization technique. The four different objective functions are employed based on the transfer function amplitude of; the top displacement, the top absolute acceleration, the base shear and the base moment. The stiffness parameter of SDB at each floor level is taken into account as design variables and the sum of the stiffness parameter of the SDB is accepted as an active constraint. An optimization algorithm based on the Artificial Bee Colony (ABC) algorithm is proposed to minimize the objective functions. The proposed ABC algorithm is applied to determine the optimal SDB distribution for planar buildings in order to rehabilitate existing planar steel buildings or to design new steel buildings. Three planar building models are chosen as numerical examples to demonstrate the validity of the proposed method. The optimal SDB designs are compared with a uniform SDB design that uniformly distributes the total stiffness across the structure. The results of the analysis clearly show that each optimal SDB placement, which is determined based on different performance objectives, performs well for its own design aim.
Determination of antibiotics by SPE-LC-MS/MS in wastewater and risk assessment
Aydin, Senar,Aydin, Mehmet E.,Ulvi, Arzu,Kilic, Havva Techno-Press 2018 Advances in environmental research Vol.7 No.3
In this study, conditions of solid phase extraction (SPE) for determination of some antibiotics such as trimethoprim, oxytetracycline, erythromycin, clarithromycin, azythromycin, doxycycline, sulfamethazine, ciprofloxacin, chlortetracycline, sulfamethoxazole in wastewaters were optimized. After the optimum volume and pH of the sample were determined, the effect of the concentration of the compounds and matrix were investigated. The highest recovery rates for antibiotic compounds were determined between 82% and 105% in 200 mL sample volume and pH 2.5. Then, antibiotic compounds were investigated in influent and effluent samples taken from Konya Urban Wastewater Treatment Plant. The concentration of the antibiotics was detected range of 0.11-101 ng/L in influent waters and <dl-288 ng/L in effluent samples in wastewater treatment plant. Hazard quotients (HQs) of antibiotic compounds determined in WWTP effluents to evaluate the risk towards different aquatic organisms (algae, Daphnia magna and fish) were determined. Azythromycin for fish and erythromycin, sulfamethoxazole, ciprofloxacin, clarithromycin for algae posed a moderate risk while azythromycin, ciprofloxacin, clarithromycin, oxytetracycline posed a high risk for algae in the receiving environment.
( E Sacide Kozan ),( Salih Kozan ),( Yalcin Aral ),( Ahmet Yildirim ),( Mesut Akyol ),( Zafer Aydin Ecemis ),( Necat Imirzalioglu ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Graves` disease is more prevalent in women. HLA-DR locus, an immune response genes, is well-studied in different populations, but the difference in distributions of succestibility alleles between females and males are required to be clarifi ed. Methods: Totally 140 subjects consisting of 70 patients with Graves` disease (GD) (44 females, 26 males) and 70 controls (55 females, 15 males) were included to the study. Thirteen polymorphisms for DRB1 with DRB3, DRB4 and DRB5 were analysed by PCRSSP method. The difference in distributions of DR alleles were compared between females and males. A study model was designed for confi rming of Results: Results: None of DR polimorphisms, in existance or absence of alleles, was associated with GD among males. However, in absence of DRB1*07, GD risk was higher than the carriage of at least one allele in females (p=0.012, OR=9.56). In addition, the development of GD risk among females was higher in the carriage of at least one DRB1*15 allele (p=0.004, OR=4.67). Carriage of DRB5 was also found in association with GD among females with suggestive risk (p=0.003, OR=4.07). However, underlying cause of the risk was unclear due to the haplotype inheritance of DRB1*15/ DRB5. Conclusions: We concluded that, gender is an effective factor on the evaluation of the association between DR polymorphisms and GD.
Aydin, Mehmet,Jung, Yeong-Sang,Lee, Hyun-Il,Kim, Kyung-Dae,Yang, Jae-E. Korean Society of Soil Science and Fertilizer 2012 한국토양비료학회지 Vol.45 No.1
The thermal properties including volumetric heat capacity, thermal conductivity, thermal diffusivity, and diurnal and annual damping depths of 10 representative soil series of Korea were calculated using some measurable soil parameters based on the Taxonomical Classification of Korean Soils. The heat capacity of soils demonstrated a linear function of water content and ranged from 0.2 to $0.8cal\;cm^{-3}^{\circ}C^{-1}$ for dry and saturated medium-textured soil, respectively. A small increase in water content of the dry soils caused a sharp increase in thermal conductivity. Upon further increases in water content, the conductivity increased ever more gradually and reached to a maximum value at saturation. The transition from low to high thermal conductivity occurred at low water content in the soils with coarse texture, and at high water content in the other textures. Thermal conductivity ranged between $0.37{\times}10^{-3}cal\;cm^{-1}s^{-1}^{\circ}C^{-1}$ for dry (medium-textured) soil and $4.01{\times}10^{-3}cal\;cm^{-1}s^{-1}^{\circ}C^{-1}$ for saturated (medium/coarse-textured) soil. The thermal diffusivity initially increased rapidly with small increases in water content of the soils, and then decreased upon further increases in the soil-water content. Even in an extreme soil with the highest diffusivity value ($1.1{\times}10^{-2}cm^2s^{-1}$), the daily temperature variation did not penetrate below 70 cm soil depth and the yearly variation not below 13.4 m as four times of damping depths.